exam Maths Puzzle Numerical Ability

Please graph this for me!!!
3x-4y<12
McGraw Hill 6th edition, chapter 7.4,exercise# 28. Thank you so much for your time!!

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exam Other Question
I've tried this one and I just can't get it, please help.

f(x) * h(x)=

if
f(x)= 7x-40
h(x)- -x^2 + 6x discuss the main functions operations research